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2 sheets-sheet 2.

(No Model.) .v P' D TQUGEY v STEAM ENGINE VALVE. l E/ No. 456,174.Patented July 21,1891.

' lar valve.

UNITED STATES F ERRIS D. TOUOEY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OFTHREE-l f PATENT OFFICE.

FOURTI-IS TO FRANK DUNIIAM AND FREDERICK O. JOHNSON, BOTH OF SAME PLACE.

STEAM-ENGIN E VALVE.

Application tiled July 15, 1890.

To all whom t may concern:

Be it known that I, FERRIs D. ToUCEY, of Minneapolis, in the county ofHennepin and State Vof Minnesota, have invented certain new and usefulImprovements in Steam-Engine Valves, of which the following is aspecication.

This invention relates particularly to irnprovements in valves forlocomotive-engines, although the invention may be applicable to enginesof other kinds, and the objects Ihave invview are to provide an improvedslidevalve that shall be of simple construction and with which therewill be the smallest possible amount of friction.

To-these ends the invention consists, generally, in the construction andcombination hereinafter described, and particularly pointed out in theclaims.

In the accompanying drawings, forming a part of this specification,Figure 1 is a longitudinal section of the steam-chest and valve and aportion of the cylinder of a locomotive-engine. Fig. 2 is a transversesection through the steam-chest and a portion o f the cylinder andthrough the valve, the two sides being shown with the section taken indifferent planes. Fig. 3 is a plan View of the lower or main portion ofthe valve, showing in section the steel packing placed between the twosections of the' valve. Fig. 4 is a section similar to Fig. 1, butshowingacircu-- Fig. 5 is a plan of the lower section of the valve shownin Fig. 4.

In the drawings, 2 represents the cylinder, and 3 the steam-chest, bothbeing of any ordinary or preferred construction. The cylinder isprovided withl the usual intakeports 5 and 7 and with the exhaust-port9, all communicating with the steam-chest in the usual way. Thesteam-chest is provided with a plane-surfaced cover 11, preferablybolted to its upper surface, and I prefer to make this cover of concaveform, with the face-plate 13 on the under side of the cover,

vforming the bearing for the valve. The

cover may be strengthened by means of the transverse ribs 14. The coverthus formed is advantageous, for the reason that it is in theSPECIFICATION forming part of Letters Patent N o. 456,174, dated July21, 1891.

Serial No. 358,816. (No model.)

form of an arch, and it thus possesses great 5o strength while beingvery light.

Arranged in the steam-chest is a valve consisting of two parts orsections 17 and 19. The section 17 is of rectangular form, preff erably,and is providedy with a planevunder surface resting upon theVvalve-seat. This valve-section is preferably providedwith a lip orflange 21, extending around it, and a yoke 23 encircles the sectionabove this lip, and to this yoke is connected the valve-stem 25, bymeans of vwhich the valve is moved in the steam-chest in the usualmanner. In the upper surface of the valve-section 17 are the grooves 27,which extend transversely therein, one i-nv each side of the valve-section. In each of these grooves is placed a series of eccentricspring-rings 29. These rings are preferably cut once, and they pro jectfor a short distance above the walls of the groove. These rings are ofeccentric form, and therefore larger and heavier at the bottom, and theythus naturally remain in position with the cut portions uppermost. Imay7 also provide parallel to the grooves 37 thegrooves 31, in which arearranged the steel'packing-blades 33, that project into similar groovesin the section 19. These blades are arranged loosely in the grooves andoverlap at the corners of the valve. The pressure of steam in thesteam-chestv holds them against the inner surfaces of the grooves,making steam-tight j ointsf The'up per valvesectionl 9 isalsopreferablyof rectangularform and is provided with the dependingflanges 35, extending transversely across the inner sides of thevalve-sections, these flanges being adapted to project inside thevalve-section 17. The inner walls of the valve-section 19 above theflanges 35 are preferably curved inward, as shown in Fig. 1, for thepurpose of making the ripper surface of the section of greater area andpreventing the exhauststeam from striking an upward blow on thesteam-chest cover. The valve-section 19 is arranged upon the section 17with the flange 35 projecting inside of the section 17 and resting uponthe eccentric rings 29. The upper surface of the section 19 is againstthe under surface of the cover, and the two sections are held apart bythe spring-rings 29. I also prefer to provide in the upper surface ofthe section 19 a groove 37, designed to catch any water that may collecttherein from the partial leakage of the steam between the surface of thevalve and the cover.

Instead of forming the valve-sections of rectangular form, they may becircular, as shown in Figs. 4 and 5, and in this case the packing-bladewill be a ring or clasp lying in the circular grooves in the twosections and having its ends overlapping, as shown in Fig. 5. I prefer,also, in this instance to provide the section 19 with a convex uppersurface and to arrange thereon an oscillating ring or` cap 20, having' aconcave lower surface and bearing against the under side of thesteamchest cover. This ling forms a ball-andsocket joint with thesection 19.

I have shown with this form of valve an exhaust that leads directlythrough the cover of the steam-chest. By using this arrangement theexhaust is upward instead of' downward, thereby shortening the distancethat the exhaust-steam must travel from cylinder to exhaust-nozzle, thusincreasing the speed of the engine by preventing back-pressure orchokingl in the exhaust-pipes- This valve possesses many advantages overThere is,

between them the upper section is h eld against t the face-plate on theunder side of the steamchest cover,and, being formed in one piece, makesa better joint and is less liable to leak steam through to theexhaust-cavity. The lower section of the valve is held to its seat withan elastic tension, so that under press-` ure ot water, steam, or airthis section can lift' and discharge without danger of breaking thecylinder, cylinderheads, piston-head, or packing-rings, while the topsection ot valve does not have its bearing on the under side ofsteam-chest cover. The packing-blades between the two sections of thevalve are automatic in their action. They are held over the jointbetween the two sections of the valve and are loose when there is nopressure of Steam. rlhe eccentric spring-rings take up but small space,and the elasticity is greatest toward the en ds, so that the tension isequally distributed. With the circular forni of valve I obtain a largerand longer area of admission-ports, thereby giving a greatersteampressure on the piston up to the point of cutoff. The circularvalve can also all be made in a lathe and requires no filing or visework.

The oscillating ring on the top of the valve will in all cases keep itsbearing or seat against the inside of steam-chest cover. It makes nodifference if the distance does vary between the valve-seat and cover,and there will be no leak, as the eccentric rings between the twosections of the valve will hold the upper surface of the ringelastically against the cover.

I may construct the valve with ahorizontal flange on the outside, asshown in Fig. 1, or without such flange, as shown in Fig. et. As thisflange is exposed to steam-pressure and causes additional friction onthe seat,I prefer to omit the ange, in which case only the channel, inwhich the packing-blad es are confined, is exposed to pressure.

I claim as my inventionl. The combination, with the steam-chest, of avalve-section arranged therein provided with grooves in its uppersurface, eccentric rings arranged in said grooves and projecting abovethe surface ot the section, and a section arranged upon said first-namedsection and between it and the cover of the steam-chest, substantiallyas described.

2. The combination, with a steam-chest, of an opcn-valve sectionarranged therein provided with grooves in its upper surface, eccentricrings arranged in said grooves, a second section arranged upon saidsection, and steel blades arranged in grooves in said sections andforming a steam-packing between said sections.

3. The combination, with the steam-chest, of the valve having the twoopen sections, with spring-tension devices arranged between saidsections, a steam-packing between said sections, and the cover securedupon said steam chest and having a concave form and provided with aface-plate, substantially as described.

4. The combination, with a steam-chest, of open-valve sections arrangedin said steamchest, one of said sections being provided with a convexupper surface, and an oscillat and between it and the under surface ofthe steam-chest cover, substantially as described.

5. The combination, with aisteam-chest, of two open-valve sectionsarranged therein, spring-tenson devices between said sections, andblades 33, arranged in grooves in said sections and formingsteam-packing between said sections.

In testimony whereof I have hereunto set my hand this 30th day of May,1890.

` FERRIS D. TOUCEY. In presence of- A. M. GAsKILL, C. G. HAWLEY.

ing ring or cap arranged upon said section IOL.'

IIO

